Is it ok to mix foliar treatment solutions?

ladonApril 19, 2013

I have a few different products that I use to keep my plants free from disease and pests, which I apply as foliar sprays. I also do foliar feedings as the season progresses. I keep them on a rotation so as to increase effectiveness, but it's a bit of a pain to keep track of when I've done each and to transfer the solutions from their storage containers to the one sprayer that I use. I'm wondering if it's ever ok to mix these products just for convenience sake. Currently, here's what I am using:

A mix of Actinovate and Excel LG (fungicide)
Bonide Copper Fungicide
Safer Caterpillar Killer (BT)
Neptune's Harvest (kelp/fish emulsion food)
Can any of you more experienced gardeners give me some feedback on this?

Much appreciated,

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digdirt2(6b-7a No.Cent. AR HZ8 Sun-35)

Mix together? Generally no. Negates the benefits of each in many cases plus possible chemical interactions.

Alternate them? Sure, per label directions on timing.

A simple calendar with dates and names solves one problem and using separate, labeled sprayers for each chemical is always recommended anyway.


    Bookmark   April 19, 2013 at 2:44PM
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Separate sprayers for each? That's a lot of sprayers....I don't really have a lot of room for storage...they're pretty big (about a gallon each). Is it ok to rinse out the sprayer and hose, and just alternate the solution as needed?

    Bookmark   April 19, 2013 at 3:16PM
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digdirt2(6b-7a No.Cent. AR HZ8 Sun-35)

s it ok to rinse out the sprayer and hose, and just alternate the solution as needed?

Yeah, with great care since many of them contain emulsifiers and oils so a quick rinse and dump with cold water doesn't cut it,

But just ask the gardener who didn't get it rinsed well and ended up spraying herbicide along with the fertilizer if having only one sprayer is enough.

At the very least separate marked sprayers for fertilizers, pesticides, herbicides, and fungicides to avoid cross contamination can prevent a lot of grief.

Switch to hose-end sprayers. They are small, easy to store, and cheap.


    Bookmark   April 19, 2013 at 3:52PM
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sandy0225(z5 Indiana)

go to three sprayers, one for weed killer, one for fungicide and one for pest killers. You can use either of the ones that aren't weed killer for fertilizer. But don't use the weed killer one for anything but weeds!

    Bookmark   April 20, 2013 at 6:18PM
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